<!--
 * Tencent is pleased to support the open source community by making BK-JOB蓝鲸智云作业平台 available.
 *
 * Copyright (C) 2021 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * BK-JOB蓝鲸智云作业平台 is licensed under the MIT License.
 *
 * License for BK-JOB蓝鲸智云作业平台:
 *
 *
 * Terms of the MIT License:
 * ---------------------------------------------------
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
 * to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of
 * the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
-->

<template>
  <div
    v-bkloading="{ isLoading, opacity: 0.8 }"
    class="render-trend-box">
    <div class="data-wraper">
      <div class="total">
        {{ data.count }}
      </div>
      <div
        class="data-row"
        :class="{
          'down': data.yoyTrend < 0,
          'up': data.yoyTrend > 0,
          'equal': data.yoyTrend === 0,
        }"
        style="margin-top: 12px;">
        <span class="label">{{ $t('dashboard.同比') }}</span>
        <span>
          <icon
            v-if="data.yoyTrend < 0"
            type="decrease-line" />
          <icon
            v-if="data.yoyTrend === 0"
            type="equally" />
          <icon
            v-if="data.yoyTrend > 0"
            type="increase-line" />
        </span>
        <span>{{ data.yoyValue }}</span>
      </div>
      <div
        class="data-row"
        :class="{
          'down': data.momTrend < 0,
          'up': data.momTrend > 0,
          'equal': data.momTrend === 0,
        }"
        style="margin-top: 10px;">
        <span class="label">{{ $t('dashboard.环比') }}</span>
        <span>
          <icon
            v-if="data.momTrend < 0"
            type="decrease-line" />
          <icon
            v-if="data.momTrend === 0"
            type="equally" />
          <icon
            v-if="data.momTrend > 0"
            type="increase-line" />
        </span>
        <span>{{ data.momValue }}</span>
      </div>
    </div>
    <div class="data-chart">
      <div
        ref="trend"
        style="width: 100%; height: 60px;" />
    </div>
  </div>
</template>
<script>
  import * as echarts from 'echarts';
  import _ from 'lodash';

  import StatisticsService from '@service/statistics';

  import { prettyDateFormat } from '@utils/assist';

  const styleMap = {
    up: {
      itemStyle: {
        color: '#4BC7AD',
      },
      areaStyle: {
        color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
          {
            offset: 0,
            color: 'rgba(75, 199, 173, 0.32)',
          },
          {
            offset: 1,
            color: 'rgba(75, 199, 173, 0)',
          },
        ]),
      },
    },
    down: {
      itemStyle: {
        color: '#FF5656',
      },
      areaStyle: {
        color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
          {
            offset: 0,
            color: 'rgba(255, 86, 86, 0.28)',
          },
          {
            offset: 1,
            color: 'rgba(255, 86, 86, 0)',
          },
        ]),
      },
    },
  };

  export default {
    name: '',
    props: {
      metric: {
        type: String,
        required: true,
      },
      date: {
        type: String,
        required: true,
      },
    },
    data() {
      return {
        isLoading: true,
        data: {
          count: 0,
          momRate: 0,
          yoyRate: 0,
        },
      };
    },
    watch: {
      date() {
        this.fetchData();
      },
    },
    mounted() {
      this.trendData = [];
      this.fetchData();
      const resize = _.throttle(() => {
        this.myChart && this.myChart.resize();
      }, 300);
      window.addEventListener('resize', resize);
      this.$once('hook:beforeDestroy', () => {
        window.removeEventListener('resize', resize);
      });
    },
    methods: {
      fetchData() {
        this.isLoading = true;
        Promise.all([
          StatisticsService.fetchTotalMetrics({
            date: this.date,
            metric: this.metric,
          }).then((data) => {
            this.data = data || {};
          }),
          StatisticsService.fetchTrendsMetrics({
            endDate: this.date,
            startDate: prettyDateFormat(new Date(this.date) - 6 * 86400000),
            metric: this.metric,
          }).then((data) => {
            this.initTrend(data);
          }),
        ]).finally(() => {
          this.isLoading = false;
        });
      },
      initTrend(data) {
        this.myChart = echarts.init(this.$refs.trend);
        const dateList = [];
        const valueList = [];
        data.forEach(({ date, value }) => {
          dateList.push(date);
          valueList.push(value);
        });

        const styles = _.head(valueList) <= _.last(valueList) ? 'up' : 'down';

        this.myChart.setOption({
          grid: {
            top: 5,
            right: 5,
            bottom: 5,
            left: 5,
          },
          xAxis: {
            boundaryGap: false,
            data: dateList,
            show: false,
          },
          yAxis: {
            type: 'value',
            min: 'dataMin',
            max: 'dataMax',
            boundaryGap: [
              0,
              '100%',
            ],
            show: false,
          },
          series: [
            {
              name: 'trend',
              type: 'line',
              symbol: 'none',
              sampling: 'average',
              ...styleMap[styles],
              data: valueList,
            },
          ],
        });
      },
    },
  };
</script>
<style lang='postcss' scoped>
  .render-trend-box {
    display: flex;
    align-items: flex-end;

    .data-wraper {
      display: flex;
      margin-right: auto;
      font-size: 12px;
      line-height: 16px;
      color: #babcc2;
      white-space: nowrap;
      /* stylelint-disable declaration-block-no-redundant-longhand-properties */
      flex-direction: column;
      flex-wrap: nowrap;

      .total {
        font-size: 24px;
        font-weight: 500;
        line-height: 32px;
        color: #63656e;
      }

      .data-row {
        display: flex;
        align-items: center;

        &.up {
          color: #4bc7ad;
        }

        &.down {
          color: #ff5656;
        }
      }

      .label {
        margin-right: 6px;
        color: #babcc2;
      }
    }

    .data-chart {
      flex: 1;
      padding-left: 30px;
      overflow: hidden;
    }
  }
</style>
